Date: 03/02/2010
High voltage synchronous current mode step-down dc/dc controller from Linear
Linear has introduced the LT3845, a new high voltage, low quiescent current synchronous step-down dc/dc controller designed for medium to high power, high efficiency supplies. The LT3845 controller is suitable for 12V and 24V automotive systems, industrial controls, heavy equipment, avionics and military systems applications.
The key features of the LT3845 dc/dc controller are,
Operating input voltage ranges from 4V to 60V
Synchronizable up to 600kHz
Adjustable Constant Frequency from 100kHz to 500kHz
Output voltages up to 36V
Adaptive Nonoverlap Circuitry prevents switch shoot-through
Reverse inductor current inhibit for discontinuous operation improves efficiency with light loads
Programmable soft-start
120ľA of no load quiescent current
10ľA of shutdown supply current
1% of regulation accuracy
Current limit unaffected by duty cycle
Reverse overcurrent protection
The LT3845 device's onboard N-channel MOSFET gate drivers provide output current up to 20 amps at efficiencies as high as 95%. The other features include short-circuit protection, adjustable soft-start, thermal shutdown and precision input undervoltage lockout.
Package: 16-Lead Thermally Enhanced TSSOP Package, 16-Pin PDIP
Price: Starts at each $10.65 for 1k pieces
Availability: Now
For more details visit www.linear.com